For citations:
Bel'diev S.N., Medvedeva I.V., Platonov D.Yu., Trufanova G.Yu. Studies of Anticoagulant Therapy in Frail Elderly Patients: Problems of Terminology and Methodology. Rational Pharmacotherapy in Cardiology. 2019;15(2):251-257. (In Russ.) https://doi.org/10.20996/1819-6446-2019-15-2-251-257